112 is the emergency number, a LOT of Belgian people speak english, from my time there.
112 is the international number for emergency services, and can also be used in the UK.
THIS IS VITAL TO KNOW IF PHONING FROM A MOBILE - READ ON
If you cannot get reception on your network 999 will only(as far as I am aware) ONLY try your network.
112 will go to the best signal REGARDLESS OF NETWORK, even in the UK, but please don't try it, unless you have to, but rest assured it DOES work.
tabetha